涤纶专用阻燃剂的发展及其技术应用

我国从上世纪八十年代初开始进行阻燃涤纶的研究工作,大体可分为三个阶段:第一阶段利用含溴共聚单体与聚酯单体进行三元共聚,天津化纤所、北京化纤所和吉林化纤所采用美国杜邦公司的生产方法,采用四溴双酚A共聚单体对聚酯进行共聚阻燃改型,终因技术路线不成熟,吉林化纤所完成中试鉴定后,没有将该技术继续进行下去。第二阶段80年代中期,辽阳石化研究院利用美国大湖公司提供的十溴联苯醚为主的阻燃剂,生产共混型阻燃切片,并同浙江阻燃集团(原浙江沙发布厂)生产阻燃涤纶纤维,该方法由于在切片生产过程中,对设备腐蚀性很大,同时阻燃切片纺丝性…     

发改委修改产业结构调整指导目录 纺织类有变化自5月1日起施行

2月26日,发改委公布最新修改的《产业结构调整指导目录(2011年本)》,其中鼓励类纺织品种、限制类纺织设备有所变化。发改委称,此次修改是为了更好地适应转变经济发展方式的需要,修改后的《产业结构凋整指导目录》将于今年5月1日起施行。据了解,鼓励类"二十、纺织"第1项:"差别化、功能性聚酯(PET)的连续共聚改性[阳离子染料可染聚酯(CDP、ECDP)、碱溶性聚酯(COPET)、高收缩聚酯(HSPET)、阻燃聚酯、低熔点聚酯等];熔体直纺在线添加等连续化工艺生产差别化、功能性纤维(抗静电、抗紫外、有色     

热收缩膜用聚酯的合成及其性能研究

研究了锑系和钛系催化剂对热收缩膜用聚酯合成工艺的影响,以及共聚单体1,4-环已二甲醇(CHDM)、二甘醇(DEG)和间苯二甲酸(IPA)对热收缩膜用聚酯的玻璃化转变温度(T_g)、熔点(T_m)、结晶性能、热稳定性和聚酯热收缩膜性能的影响。研究结果表明,合成热收缩膜用聚酯宜采用锑系催化剂;热收缩膜用聚酯的T_g和T_m与共聚单体的种类及其添加量有关;共聚单体对热收缩膜用聚酯的结晶性能影响较大,但对其热稳定性影响不大。     

伊士曼:环保材料成就“美”好生活

伊士曼联手台湾创意咖啡和茶冲泡壶具制造商E.K.International公司推出由伊士曼TritanTM共聚聚酯材料制造的新一代HandyBrew和Clever系列环保冲泡壶。与传统的聚碳酸酯材料相比,TritanTM共聚聚酯具有不含双酚A的环保特     

PET--高阻隔聚酯瓶的改性技术及发展前景

目前,聚酯瓶(PET)已逐渐成为饮料包装领域的首选材料,由于其具有透明性好、化学性质稳定、阻隔性相对较好、质轻价廉和可回收再利用等优点,因而应用十分广泛。但作为啤酒包装,PET瓶的气体阻隔性仍不符合要求。因此,不断提高聚酯瓶的气体阻隔性是当前的主要研究方向。我国是世界啤酒生产大国,也是啤酒销售大国,研究开发啤酒的高阻隔聚酯包装材料具有十分重要的意义。1、共聚改性为提高聚酯(PET)的阻隔性能,通常采用二醇类、二羧酸类或NDC(2,6—萘二甲酸二甲酯)等作为共聚载体,对聚酯进行共聚改性。最近,日本三井石油公司开发的共聚酯B0…     

热熔胶和热熔系统

热熔胶和热熔系统向贤伟热熔胶技术及发展最早研究采用的热熔胶为热塑性的脂聚乙烯树脂、丁基橡胶，并对它们进行共聚、共混改性以提高性能。以后又开发了聚酯、聚酯、聚氯酯，ＥＶＡ等热熔胶。并研究开发了适合热熔胶特点（需加热熔融，固化快速），配合热熔胶使用，发挥...     

中外交流

日本住友投资浦东今年上半年，日本住友株式会社在上海浦东新区外高桥保税区三联发展园区已连续投资了3个项目，一共投入资金1600万美元。今年3月，由日本住友控股的倍克精密塑料（上海）有限公司增资600万美元，扩租土地近9000平方米，用于生产住友开发的高性能塑料模具。其后，由日本住友化学投资建立的两家公司在6月开业，这两家公司总投资1000万美元。伊士曼特种塑料进入中国日化包装领域以共聚聚酯系列产品著称于世的跨国公司美国伊士曼的产品得到了美国食品和药品管理局的认可，该公司近期开发出的新品Eastar生物特级型共聚聚酯，为…     

Nurel的新聚酯特种纤维和纱线

意大利合纤生产商Nurel公司为丝及非织造布生产商提供多种聚酯短纤产品，用于工业用或医用或作填充材料．Terylene聚酯短纤系列最近又有新产品推出．新产品通过改进位于Zaragossa的工厂的聚合生产线生产出来。采用特种聚合物如阳离子、阻燃抗菌或无锑生产，成为生产新纺织品及非织造产品的不可或缺的伙伴。     

科技专题

意大利合纤生产商Nurel公司为丝及非织造布生产商提供多种聚酯短纤产品,用于工业用或医用或作填充材料,Terylene聚酯短纤系列又有新产品推出,新产品通过改进位于Zaragossa的工厂的聚合生产线生产出来。采用特种聚合物,如阳离子、阻燃、抗菌或无锑生产,使Nurel成为生产新纺织品及非织造产品的不可或缺的伙伴。 采用Nurel FR阻燃聚酯短纤维(1.7;3.3;7dtex)生产的织物有极大安全性,因为聚合物中直接混合了添     

X荧光光谱法测定磷系阻燃聚酯切片中的磷含量

采用X射线荧光光谱法测定磷系共聚酯阻燃聚酯切片中的磷含量,通过实验确定了制样条件,并绘制了标准曲线.实验结果表明:用该方法测试阻燃切片中的磷含量,相对标准偏差小于2%.     

环保阻燃剂对涤纶织物阻燃性能的研究

本论文分别采用环化磷酸酯和十溴二苯乙烷两种阻燃剂对纯涤纶织物阻燃整理。采用极限氧指数仪、垂直燃烧测定仪和锥形量热仪分别对整理后涤纶织物的阻燃性能进行研究。研究结果表明,两种阻燃剂均能够改善涤纶织物的阻燃性能,阻燃性能均能达到GB 20286-2006标准中的阻燃B1级。阻燃整理后,涤纶织物的断裂强力没有受到明显影响。     

矿用隔爆兼本质安全型动力中心的研究应用

介绍了矿用隔爆兼本质安全型动力中心的结构、特点、保护性能,具有很好的应用发展前景和可观的经济效益,是适时满足煤矿井下生产要求的一种理想配电设备。     

国内精对苯二甲酸产业的发展及供需预测

精对苯二甲酸(PTA)是聚酯生产的重要原料,也是聚酯产业链中的关键产品。重点分析了十一五期间国内PTA产业供需及盈利情况,对十二五期间国内PTA产业的供需趋势进行了预测,并对PTA产业的健康发展提出了建议。     

A comprehensive test method for inline flame arresters

The certification test standards that presently exist for flame arresters are highly inadequate for inline applications. A proper flame arrester test method should ensure that a unit will work with any flame front conditions that it could be exposed to in actual use. When evaluating flame arrester performance, it is just as dangerous to neglect deflagration testing as detonation testing. The comprehensive inline flame arrester test method outlined here involves exposing a unit to the entire flame propagation pressure spectrum. This includes low, medium and high pressure deflagrations as well as overdriven and stable detonations. The test method also takes into account the following factors: flow restriction on the protected side of the flame arrester, flame propagation through a flowing gas, initial system pressure and temperature, and specified gas mixture. Flow restriction on the protected side of the flame arrester has a very significant effect on performance and has not previously been given consideration in flame arrester testing. Besides moving flame front test, endurance burn testing and hydrostatic pressure testing are also discussed here. Major regulatory organizations have recently adopted these findings as the basis for new standards proposed to cover an inline flame arrester test method.     

氮气与发泡剂联合防火技术在综放工作面的应用

综放工作面的煤层自燃是制约安全生产的主要因素。本文针对兴阜煤矿2312综采工作面的实际情况,提出了氮气与发泡剂联合使用的防火技术,介绍了防治自然发火的作用机理。现场实际应用表明,氮气与发泡剂联合防火技术降低了煤炭自燃发火的危险性,具有良好的预防自燃发火效果。     

大数据成为现实生产要素的企业实现机制:产品创新视角

数字经济的崛起,使数据成为新的生产要素,但现有研究对数据成为现实生产要素的企业实现过程缺乏理论剖析与实证研究。鉴于产品创新是企业活动中各种生产要素最具集成特征的一环,本文从产品创新视角,构建“大数据资源—企业能力—产品创新绩效”链式中介模型开展实证研究,探讨大数据从可能的生产要素成为企业现实生产要素的实现机制。基于特征映射逻辑,将大数据分析、组织学习、惯例更新、行业竞争压力、行业信息技术使用强度分别视为劳动、知识、管理、资本、技术的替代变量,将企业的产品创新实现机制映射为数据与其他五个生产要素相结合成为现实生产要素的实现路径模型,提出数据是将现有生产要素进一步联系起来的桥梁型生产要素的观点,形成对数据作为生产要素的新认知。本文结论为数据作为新生产要素的思想提供了企业产品创新视角的理论解释,也为企业大数据创新实践提供了管理启示。     

Interaction of acoustic waves with flame front propagation

The mechanisms of laminar premixed flame propagation have been intensively studied over the last century. Numerous authors have highlighted intrinsic phenomena in flame propagation such as Darrieus-Landau instability and Rayleigh-Taylor instability. Rayleigh-Taylor instability is often linked to the interaction between the flame front and an acoustic wave. To better characterize the interaction between a flame and aerodynamic conditions, we designed a special vertical closed tube apparatus. Our analysis focused on the behavior of a flame that propagates in a uniform stoichiometric mixture of H₂ and O₂ diluted with nitrogen. The experimental investigation revealed that acoustic waves emitted as the flame formed near the ignition point could increase the flame front surface by a factor of 10. An acoustic node with an amplitude of 1.3 m was identified and seemed to be responsible for the disappearance of one of the acoustic modes and for a reduction in the average flame surface. This could explain why the flame trajectory had two distinct parts: one corresponding to propagation at a high speed in the lower part of the tube, and the other with a slower speed in the upper part of the tube. The flame surface seemed to depend primarily on the frequencies of vibration and marginally on the nature of the reactive components. Propagation velocities, obtained by multiplying these flame surfaces by the fundamental burning velocity, strongly depended on the mixture reactivity. © 2009 American Institute of Chemical Engineers Process Saf Prog, 2009     

煤炭洗选企业产品结构方案与经济效益模型分析

针对适合地区和企业技术特点确定符合循环经济发展模式的产品生产方案和考虑企业本身生产经济性的研究不足的状况,重点对青海省海北地区的跳汰-浮选工艺选煤企业,基于地区煤质特点,利用产品结构优化三原则进行分析,提出企业产品结构方案;在此基础上,利用系统工程理论建立了多种条件约束下的企业经济利润最大化的经济模型;最后以约束条件为关联,绘制产品结构方案-经济模型关联图。其研究成果可具体指导青海海北地区选煤企业进行产品结构调整和经济效益分析,也为地区行业管理提供理论参考。     

Experience-based learning in innovation and production

How can we model and document the impact of experience in product innovation? We use data on the innovation and production histories of 294 product platforms to explore experience‐based learning. We extend learning curve concepts from their traditional domain – the production process – into the product innovation process to build and test a richer, quantitative model of learning. The results suggest that learning occurs differently in the innovation process than in production. They also suggest that how and where a firm learns depend in part on the complexity of product components and sub‐systems. Finally, we discuss the competitive implications for product innovation.     

Company Competencies as a Network: The Role of Product Development

Product development managers and academics like to assure themselves and each other that new product development is one of the most critical areas of company competence and contributes positively to company success. But does top management agree? Because if they do not, the consequences will heavily influence the resource allocation to product development and career possibilities of new product developments manager. This study examines how top managers view the importance of product development relative to other central competence areas. Although asking managers about their perception is one way of evaluating the importance, its contribution to company success is another important measure. In this study, the impact of product development, relative to other important competence areas, is measured to assess further how critical product development is for overall company success.The authors investigate these matters in a survey of top managers in 513 Danish production companies. Ten areas important for achieving company objectives are identified. These are product development, market intelligence, production management, strategy and vision, sales, market responsiveness, promotion, internal co-operation, image, and supply management. Product development is rated a fairly important competence as it ranks number four, with sales, market responsiveness, and production management ranking numbers one to three. Yet a distressing negative impact on overall company success is found for product development proficiency, whereas success is positively related to production management, image, and differentiation of products. Further analysis reveals that product development contributes positively to success by enabling product differentiation and enhancing promotion proficiency. Influenced by and influencing many other competencies, product development is found to be a central competence.Results support a nonfunctional and broad perspective of how bundles of competences interact and impact on success and establish a positive overall contribution to product development.